[Evaluation method and index system of eco-city development: a case study in Dafeng City of Jiangsu Province, China].

City is a kind of social-economic-natural complex ecosystem. How to realize the urban sustainable development is one of the important issues in the world. Eco-city is one of the ideal patterns for urban sustainable development, while the evaluation method and related indices of eco-city development are the main basis in measuring the effect of urban ecological planning, construction, and management. Taking the Dafeng City of Jiangsu Province as a case, the eco-city index system consisting of 58 indices of 4 categories including economic development, ecological construction, environment protection and social progress was established, and the construction effect was evaluated at different urban development phases by using Full Permutation Polygon Synthesis Illustration method. The results indicated that in 2004, the comprehensive index of Dafeng eco-city was 0.24, and the sustainable development ability was belonged to class IV, i.e., be worse, but in 2010, 2015 and 2020, it would reach to 0.45, 0.66 and 0.85, and the sustainable development ability would belong to class III, II and I, i.e., be moderate, better and excellent, respectively. This research could be a reference for decision-making of eco-city development.